Signor to the verein pur ohemisohe industrie in mainz



} G.RUMPF. PROCESS OF OBTAINING MURIATIG ACID. No. 361,026.

(No Model.)

A pr. 12, 1887.

minezsy N. PETERS. Pl wmuum n mr. Washingtnm D.C.

UNITED STATES PATENT OFFICE,

GUSTAV RUMPF, OF FRANKFORT-ON-THE-MAIN, PRUSSIA, GERMANY, AS- SIGNOR TO THE VEBEIN FI IR OHEMISOHE INDUSTRIE IN MAINZ.

' PROCESS OF OBTAINING MURIATIC ACID.

SPECIFICATION forming part of Letters Patent No. 361,026, dated April 12, 1887.

Application filed September 18, 1880. Serial No. 213,869, (No specimens.)

copper, and lead-and subject them while at a proper temperature to the action of vapors of ammonic chloride or sal-ammonia, by which they are converted into metallic chlorides. These metallic chlorides are then heated in a suitable receptacle to a temperature of 150 to 500 centigrade, and subjected to the action of a mixed current of steam and a gas containing free oxygen, as air. The chlorides are de composed and the higher oxide of the metals formed. The chlorine, being released. unites with the hydrogen of the decomposed steam and forms hydrochloric acid, which passes over into the receiver. I have found that to carry out this process successfully the higher oxides of the metals must be formed, to do which it is necessary to have free oxygen in addition to the steam; hence I use a mixed current of steam and some gas containing free oxygen, as air.

I will now describe an apparatus suitable for carrying out my process; but I do not wish to limit myself to any particular form.

In the accompanying drawing, which forms part of this specification, a is a receptacle or retort within a chamber, 1), of a furnace for the reception of the metallic oxides or chlorides. This retort is connected by pipes m with a steam-boiler, N, and supplied with oxygenated gas or air by the pipes m, coming,

from the pump ,L.

K is a steam-cylinder which operates the 5 pump L, and it receives its steam from the boiler N by the pipe m f is a retort to hold the am monic chloride, and it'is placed within the chamber d of the furnace.

E is a fire, the product-s of combustion and the heat of which pass around thc retort f, through flue 0 into I), and out at g.

The retort a is connected by pipe h to the acid-receivers i t.

The manner of carrying out the method in this apparatus is as follows: The metallic oxides are placed in retort a and the ammonia chloride in f, the fire started, and the oxides converted into metallic chlorides. When this operation has been completed, the steam and air are passed through the retort a while it is kept at a high temperature. A resulting decomposition of the chloride and formation of the acids takes place. When the metallic chlorides have all been decomposed, more ammonic chloride is placed in the retort fand the oxides again chloridized.

It will be observed that the metallic bases may be used over and over, additional sal-anr 7o monia only being required.

Having now described my invention, wha I claim is A method of making hydrochloric acid, consisting in chloridizing metallicoxides by pass. ing a current of vapors of ammonic chloride through the oxides while in a heated state, then subjecting the metallic chlorides thus formed, while at a high temperature, to a mixed current of air and steam, substantially as described.

This specification signed by me this 29th day of July, 1886.

GUSTAV RUMPF.

Witnesses:

THEODOR FILKE, ALVEsTo S. HOGUE. 

